Dunkin coral needs help

[Dbondaruk]

So i have a 40 g reef tank
i have had my dunking for about 2 months now and the last couple days he did not look so well.
i started dosing tropic marin bio calcium. 2 scoops twice a week and tropic marin pro coral organic, 1 scoop once a week.
my water peramiters did not change much except for calcium. went from 400 to 460 now.. dkh stayed a 8.5. nitrate .5 everything else 0 maybe .25 phosphate hard to tell color. i do not have a magnesium test kit to tell mag level.
only change made since was dosing and 2 new corals, acopora frag/frogspawn coral.
here are before pictures

Here are now pictures

 

[Dbondaruk]

Any thoughts

 

[gbru316]

FWIW, it's "duncan," short for the latin name Duncanopsammia axifuga. Not "dunkin" or "dunking."

Do you target feed it?

 

[Dbondaruk]

Yeah I been target feeding. I gave him food yesterday but he just held it and didn't take it down. His mouth opened but he couldn't bring it in. Just slowly let go